Calendar



(Nb Model.) 4 sheets-sheet `2. W. K. 1) A.VID.

CALENDAR.

Patented Aug. f1, 1893.

i MZZVMKQM@ (No Model.) 4 SheetsSheet 3.

W. K. DAVID.

N GALBNDAR.

No. 502,483. Patented Aug. 1, 189s.

4 sheetssheet 4. V W'. K. DAVID. Q A

GALBNDAR.

Patented Aug. l, 1893.

I- f m5571255@ l (Nu Mom.)

V No. 502,483'.

UNITED STATES PATENT DEEICE.

WVILLIAM KING DAVID, OF PHILADELPHIA, PENNSYLVANIA.

CALENDAR.

SPECIFICATION forming part of LettersPatent No. 502,483, dated August 1,1893.

Application filed October 26, 1892. Serial No. 450,041. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM KING DAVID, a citizen of the United States,residing at Philadelphia, in the county of Philadelphia and State ofPennsylvania, have invented certain new and useful` Improvements inCalendars, which are fully set forth in the followin g speciiication,reference being had to the accompanying drawings, in Which- Figure lrepresents a front elevationof a calendar embodying my improvements,with disks adjusted to show the year; Fig. 2, a detail of the sameelevation, with the disks adj usted to show the month; Fig. 3, a ,frontview of the outer or smaller disk detached; Fig. 4, a similar` view ofthe larger orinner disk; Fig. 5, a front view of the two disks detachedfrom the calendar frame, but applied to each other in working position,and adjusted for the indication shown in Fig. 2; Fig. 6, a rearelevation of Fig. l, partially broken away; Fig. '7, a detail sectiontaken on the line 7--7, Fig. l; Fig..8, adetail section taken on theline 8-8, Fig. 5; Fig. 9, a detail back view of the disk shown in Fig.3. Figs. 1 to 6 inclusive are upon one and the same scale; the remainingfigures are upon one scale, but consider-` ably enlarged from that ofthe first mentioned figures.

My invention relates to what are generally known as universal calendars,such as is shown and described in my prior Letters Patent, No. 375,736,dated January 3, 1888; and the present invention may be considered as animprovement upon the structure shown and described in the said patent.

I will now describe in detail the construction and operation of acalendar in which I have embodied my invention in working organization,and the particular improvements, which I believe to be new and wish tosecure by Letters Patent, will be pointed out more definitely in claims.

In the drawings A represents the stationary front of the calendar. Itmay be of stijf card board, or may be of any construction adapted to thepurpose. In the drawings it is shown as composed of a glass front with athin paper, containing the required indications, pasted upon the backthereof. This stiff front is shown in the drawings mounted l in asuitable frame A; but this is only for illustration, as the calendar maybe finished in a variety of forms. A pivot aperture a is made near thecenter of this front, and somedistance belov7 this is a segmental slot cstruck through the aperture a, as a center. Immediately below thissegmental slot is a segmental space B, laid oft with reference to thesame central point as the slot and divided into radial spaces ZJ withinwhich are arranged the days of the month in columns, the same asin myprevious patent mentioned above. Above the segmental slot a there isalso a second and wider slot a2 leading upward from the slot a; theopening of this Slot is intended to correspond in Width to one of theradial spaces h, but the border lines, or edges, thereof are not carriedinward or upward on said radial lines, or, at least, not for the entiredepth of the slot. In the drawings these edges a3 are shown carriedinward, or upward, a slight distance on radial lines, but then they aredeflected from a radial direction and are extended in directionsparallel to each other, and on lines which projeoted would place themoutside of the p1votal center a and on opposite sides thereof, as seenin Fig. 1. This precise form, however, is not necessary, as the edgesmay be carried inward from the commencement of the sloton parallellines, but this would provide an opening wider than necessary. I use twocalender disks in this instance, the same as in my patent previouslymentioned, namely, a front or outer disk O, and an inner or back disk D.The radius of the inner disk D is about the same as the greater' radiusof the segmental slot a', while the radius of the outer disk C is aboutthe same as the smaller radius of said slot, thus making the front disksome what smaller than the back. These disks are both mounted on andsupported by a pivot pin F.; the stem e of which is passed through thepivotal aperture a of the calendar front andthe disks are mountedthereon back of said front, as seen in Fig. 7. It will be seen that thepivot pin E is free to rotate in the aperture o. as abearing; the largerdisk D is fixed on this pivot pin so as to always turn with it, whilethe smaller disk C is arranged immediately in front of the former andloosely ICO on the pivot pin, being provided with an eyelet c whichmakes a durable bearing. In the disk C thereis cut a Vslot c' whichcommences near the outer edge of the disk and extends inward toward thecenter thereof, but not on radial lines, the edges ot the said slotbeing parallel to each other, thus corresponding with the edges of theslot, or opening, a2 in the calendar front, but the slot in the disk isonly about one-halt' the Width ofthe said slot inthe front. At the leftof this slot c', the first two figures of the century are arranged in acolulnn c2 parallel with the slot, andthe slot and column of figurestogether are intended to occupy a space otl substantially the same widthas the slot a2 in the front. The

`outer partof the face of this disk C is divided ing the disk to the pinso that it will turn with it. On the Aface of the disk D an annularspace d is marked off at the outer edge,v

which contains the designations for the days of the'week, being dividedinto spaces each of which 1s marked for one such day. Figuresrepresenting the years of a century are also arranged on the face ofthis disk in concentric rows d', the beginning of the centuryWcommencing on the inner row, as seen in Fig. 4. The entire figures ofthe several years are not contained in these rows, but only the last twofigures of each year, as will be seen in Fig. 4L of the drawings. Theseyear indications are also arranged soas to group certain indications ofseveral rows to form columns (Z2, extending from the week day circleinward toward the center of the disk, but these columns are not arrangedexactly on radial lines, but on lineswhich projected will pass just alittle to one side ot' the center. A clutch is fastened to the outerdisk and adapted to engage with the inner disk in such a way as toconnect the two disks together to cause them to move together, whenturned in one direction, but provide for a separate or independentmovement of the said disks, when turned in the other direction. As shownin the drawings this clutch is an elastic wire Gr,which is bent, in the'first place, nearly at right angles, and is secured to the back of thefront idisk at the bend by means of a ioop H, of any light fabric, whichis fastened to the disk by an eyelet h, the wire passing through theclosed end of the loop, as seen in Fig. 9. One arm g of this springextends outward on a secant line at the back of the disk and terminatesin a hook g at its outer end which is adapted to hook over and clasp theouter edge of the inner disk. The length of this arm is about equal tothe shortest distance from the point of attachment of the spring to theouter edge ot the inner disk. Normally this arm of the spring lies alittle out of the said straight line of shortest distance to the edge ofthe disk, as seen in full .lines in Fig. 9,. but, when depressed, towardthe said straight line, it will be thrown outward until finally the hookmay be caught over the edge of the inner disk, as seen in dotted linesin the said Fig. 9. The other arm g2 of the spring is also'carriedoutward on a seeant line to the edge ot the disk to which it isattached, and near the said edge is secured in place by means of a loopI, similar to the loop H and fastened to the diskv by an eyelet t'. Thearm g2 passes through the closed end of this loop, as seen in Fig. 9,and is extended outward beyond the edge of the disk, but its projectingend g3 is bent outward, or away, from the angle of the wire to form astop arm extending beyond the circumterence of the larger disk, andoperating, as will be described presently. A small block K is fastenedupon the back of the frontwA of the calendar, just below and about inline with the slot @2in the front, as seen in Fig.

The operation is as follows:l The disks are mounted upon the front ofthe calendar as described above and shown in Fig. 7, and are connectedby springing downward, or outward,the hook arm of the spring clutch, asseen in Fig. S and dotted lines, Fig. 9. It is obvious that if the pivotpin is turned to the left, the disks will be connected by the springnclutch and Vmust rotate together, moving in the direction of the arrow1 of Figs. l and 6; but if the pivot pin be turned to the right and theloose outer disk be stopped, the inner disk may still be rotatedindependently7 of the outer disk, moving in the direction indicated bythe arrow 2, Figs. 1 and 6,though the connection between the disks'issuch that they will rotate together in this direction always, unlesssome obstacle is interposed. The stop block K is this obstacle, for itis arranged in the path of the bent projecting end g3 of the springclutch, so that, when the disks are rotated in the direction of thearrow 2, the eXtreme end of this bent arm will finally strike directlyagainst this block and thereby stop the further movement of the clutchand outer disk, to which it is attached, in that direct-ion; when movingin the other direction, however, the disks will always move together forthe projecting end g3 passes over the stop block, yielding upward forthis purpose. The stop block and stop arm are so arranged that IIO IZO

the outer diskY will aiways be stopped when the slot c and column ofpart-year figures, at the left thereof, are brought directly in front ofthe opening a2 in the front A of the calendar, as seen in Fig. 1, thewidth ot' these twoY is rstturned to the right until the outer disk C isstopped, as described above, in the position shown in Fig. 1. If the tworemaining figures of the year required are not then in the column on thedisk D appearing through the said slot in the disk C, the pivot pin isturned still farther to the right and the inner disk D is thus movedalone in the direction of the arrow 2, Fig. 1, until finally the columnappears at the opening containing the last two ligures of the yearrequired; as seen in Fig. l, the column is thus brought to view in whichthe last two figures of the present year, 1892,

are found, together with those of three other years in the century. Thepivot pin is now turned to the left and the disks move together by theaction of the clutch, and in the direction of the arrow 1, Fig. 1.1 Thismovement is continued until that one of the spaces c3 onA the disk C,indicating the month required, brought into view at theopeningot2 in thefront, as seen in Fig. 2, in which October is brought to the saidopening. The days of the month and corresponding days of the week willnow be accurately indicated by the columns of figures in the segmentalspace B, and the week day indicated on the inner disk D, showing throughthe segmental slot a of the front A, as seen in Fig. 2, which shows acorrect indication for the month of October 1892, and also for the otheryears of the century found in the same column, as indicated in Fig. 1.It will be understood, of course, that the arrangement of the part yeariigures in columns on the disk D is a matter of calculation by whichthose years, in which the days of the week and days of the month willcorrespond, are brought together in the same column; which calculationit is not necessary to eX- plain here. This separation of the year fig;ures of a century, arranging the first two in short columns on one diskand the remaining two in circles and columns on the other disk, is avery desirable improvement, for it saves a great deal of space inmarking the years of a century and so enables me to bring the wholematter on to comparatively smalldisks; if the entire figures of acentury are put upon a single disk, the latter is either so large as tobe very objectionable, or the figures must be made so small as to makeit difcult to distinguish them. Y

In some details of construction changes may be made, such for instanceas the device by which the two disks are temporarily connected together,and I do not wish to be understood as limiting myself to all the detailsof construction herein shown and described, though I have found thedevices thus constructed very satisfactory in practical operation.

The construction of the calendar, herein shown and described, alsoenables me to extend the calendar, so that,it may be used for more thanone century. In order to adapt the calendar to such use, it is onlynecessary to provide an additional slot and column of figures c', c2,the first two figures of another century being used for the column.Obviously, as many slots and century columns, for this purpose, may beprovided in the disk C, as the size of the disk will permit. It isobvious that the same result may also be 0btained by enlarging the twodisks and correspondingly extending the slot and figure column on thedisk C and the figure columns on the disk D, so as to carry them forwardinto other centuries.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a calendar, an outer disk provided with a straight slot extendinginward from the outer edge toward the center and with the two firstcentury figures arranged in a column at one side of said slot, incombination with an inner disk having the remaining two iigures of thesaid years arranged in columns on lines corresponding to the centuryrslot in the outer disk, and a stationary front provided with a slot of awidth corresponding to the combined width of the slot and figure columnin the first disk whereby the adjustment of one of said disks withreference to the other will bring any one of said columns on the innerdisk to exposure at the slot in the outer disk and so complete the yearindications at the slot in the stationary front, substantially asdescribed.

2. In a calendar, the stationary frontA provided with the slot a? havingsubstantially parallel edges, in combination with the disk C providedwith slot c and column c2 of halfyear figures at one side thereof, aninner disk D having upon its face columns d2 of the two remaining yearfigures, and mechanism whereby said disks may be adjusted to bring twohalf-year columns together side by side at the opening a2 to formcomplete yearindications, substantially as described.

3. In a calendar, the stationary frontA provided with segmental slot a',slot d2 running inward therefrom, and segment B containing the days ofthe month,in combination with the outer disk C provided with slot c andcolumn c2 of half-year figures, the inner disk D provided with annularspace d containing the days of the week and columns d2 containing thelast two figures of the year and mechanism whereby the said disks may berotated together, or one independently of the other, substantially asdescribed.

4. In a calendar, an inner disk D secured to a pivot pin E, incombination with an outer disk C mounted loosely on said pivot pin, aclutch device connecting the two disks to rotate together positively inone direction and permitting the inner disk to be rotated in theopposite direction independent of the outer, and a stop device to arrestthe movement of the outer disk on the said reverse rotation at a fixedpoint, substantially as described.

5. In a calendar, the inner disk D,in combination with a pivot pin E towhich it is secured, an outer disk C mounted loosely on ICO IIS

said pivot pin, and a Wire clutch G secured to the front disk andprovided with an arm g extending outward on a. secant line and having ahook g at its extremity adapted to engage the outer edge of the innerdisk D, substantially as described.

6. In a calendar, an inner disk D, in coinbination With a pivot pin E towhich it is secured, an outer disk C mounted ioosely on said pivot pin,a spring Wire clutch G fastened to the diskC and having a hooked arm gextending outward on a secant line to engage the edge of the inner diskand another arm g2 extending outward in the opposite direction andprovided with bent extremity g3, and a stop block K arranged in the pathof the said bent end g3, substantially as described.

'7. In acalenda1',the stationary frontAprovided with segmental slot 0,and slot a2 leading inward therefrom,and the monthly day segment B, incombination with a pivot pin E mounted in said front, an outer disk Cmounted loosely on said pivot pin and provided with a slot c', half-yearcolumn c2 and month spaces c3, an inner disk D secured to said pivot pinand having on its face the Week day annulusd and straight columns d2 ofhalfyear figures, the wire clutch G fastened to the disk C and having ahooked arm g and stop arm g2, and the stop block K fastened to the backof the front A just below the slot a2, substantially as described.

WILLIAM KING DAVID.

W'itnesses:

ALoYsIA HELMICH, ROBERT C. PAGE.

